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1 0 0 0 OA Chemical-Hydrothermal Synthesis of Bioinert ZrO2-TiO2 Films on Pure Ti Substrates and Proliferation of Osteoblast-Like Cells

著者
Masato Ueda Yuumi Sasaki Masahiko Ikeda Michiharu Ogawa Wataru Fujitani Takayoshi Nakano
出版者
The Japan Institute of Metals and Materials
雑誌
MATERIALS TRANSACTIONS (ISSN:13459678)
巻号頁・発行日
vol.50, no.9, pp.2147-2153, 2009-09-01 (Released:2009-08-25)
参考文献数
31
被引用文献数
8 6
The synthesis of bioinert oxide films on pure Ti surfaces by chemical-hydrothermal treatment was investigated. Some pure Ti substrates were chemically treated with H2O2/HNO3 to form a TiO2 gel layer prior to hydrothermal treatment. Two types of solutions in the hydrothermal treatment were prepared: Zr(OH)4 gel dispersed NH3/CH3CH(OH)COOH solution and Zr dissolved NH3/CH3CH(OH)COOH solution. A uniform layer of very fine crystals were formed on the surfaces of the specimens subjected to the hydrothermal treatment. Sharp peaks attributed to TiO2 and/or ZrO2 appeared after the hydrothermal treatment. ZrO2-TiO2 composite films were successfully produced on the Ti surface by hydrothermal treatment with the Zr(OH)4 gel dispersed NH3/CH3CH(OH)COOH solution at 453 K for 12 h, following the chemical treatment. The proliferation of osteoblast-like MC3T3-E1 cells was also investigated. The cells were observed to have spread their pseudopodiums. The cell density increased monotonically with incubation period for all specimens. The proliferation of cells was strongly influenced by the surface roughness; the cell densities increased with decreasing roughness in the range of Ra=20–80 nm. Furthermore, the surface products with TiO2 showed a relatively low rate of proliferation. The strong attachment of cells to the surface may hinder cell migration.

1 0 0 0 OA Preparation of Titanium Alloy/Bioactive Glass Composite for Biomedical Applications via Selective Laser Melting

著者
Sungho Lee Jong Yeong Oh Soichiro Mukaeyama Shi-Hai Sun Takayoshi Nakano
出版者
The Japan Institute of Metals and Materials
雑誌
MATERIALS TRANSACTIONS (ISSN:13459678)
巻号頁・発行日
vol.60, no.9, pp.1779-1784, 2019-08-01 (Released:2019-08-25)
参考文献数
33
被引用文献数
5
Selective laser melting (SLM) is widely used for the additive manufacturing (AM) of metal components, which can produce net shape complex geometries. Novel titanium alloy/bioactive glass composites were successfully fabricated via SLM method for biomedical applications. The fabricated composites contained a Ti5Si3 phase, which resulted from the reaction between the titanium alloy and the bioactive glass. The phase can improve the bonding strength between composite and bone. Additionally, the remained amorphous bioactive glass phase could improve bioactivity. The present study opens a new avenue for developing new titanium alloy/bioactive glass composites with optimal bioactivity and bonding strength with the bone.